Safety device for slide-operating mechanism in presses



W. KLOCKE. SAFETY DEVICE FOR SLIDE OPERATING IVIECHANISNI IN PRESSES. APPLICATION FILED IuIIE I, 19'20.

1,407,870, rammed Feb. 2s, 1922.

much of a drawing press as is winnaar Knocks, or New Yoan, N. Y.

QAFETY DEVICE FOB SLIDE-OPERATING HEGHNISM IN PRESSES.

Leonesa.

. To all whom if may concern:

Be it known that I, -VBLLIAM KLOCKE, e. citizen of the United States of America, residing in 'New York city, in the county of Queens and State o hcw York, have invented certain new andgiseful Improvements in Safety Devices for Slideperating Mechanism in Presses, of which the following is asspecication. Y

This invention relates to drawing presses, and aims to provide improvements therein.`

The invention provides a safety connection between the blankholder or die-carrying slide and the driving part, whereby the specially formed and indre dihcultl replaceable parts of the blankfholder sli e operating mechanism will not be broken orstrained when said slide `liner-its with an unusual resistance, such as that arising from an extraneous object being left between the blankholder anddie.

IThe invention further provides a novel combination, hereinater set forth and defined, for the purpose of safeguarding the ,blank-hoider slide .operating mechanism and other parts of the press from injury due to said parts meeting with an extraordinary resistance. f v An embodiment: `oli the invention is illustrated inthe accompanying drawing, where- Figure l is a view in side elevation of so necessary to illustrate'the invention;` Y

Figure 2 isa view in end elevation of the parts shown in Figure 1, with parts shown in section, and with parts broken away;

The invention is shown as embodiedin a well-known type of press, the press shown being disclosed' in the Klocke Patent No. 955,173, dated April 19,1910.

1n said drawings, numeral 10 designated a reciprooatory slide adapted to carry a blankholder or die, 11 the bed of the press, adapted to carry the complemental part tdi-hat which is carried upon the'slide l0, and 12 designates a punch slide, here shown as working through the blank-holder slide; 1.4 designates the side piece ,of the press frame. The punch slide `is .conveniently actuated by a 'crank shaft 16; the blank-holder slide is also preterabl actuatedfirom an eccentric part 18 on sai crank shaft, through suitable drivingconnections. The eccentric part 18 is conveniently a 'crank pin on a gear 19,

Specticatiou or? Letters Patent.

Application lcd June 1,

resented ree. es, 1922.

1929.. Serial No. 885,509.

through whichumotion is Acrank shaft 16..

The blank-holder slide driving connections preferably comprise a slide 20,l which slide'is conveniently arranged to Work on a suitable slideway or gibs 22, formed on the outer side of the side .piece 14 of the press frame. Any suitable connections between the slide 20 and the blank-holder slide l0 may be provided. A suitable and convenient means comprise an extension 22 on the slide connected, through `a crank 24, by a link 25, with is connected with the slide 10 through one or more toggles 28. The rock shafts 27 and associatedparts, or their equivalents, are preferably provided on two sides of a midplane of the press in order to provide a symmetrical application to the slide 10.

Resilient means 35 are provided in the driving connections of the blank-holder slide 10, which resilient means are adaptedto yield when the blank-holderslide meets with an extraordinary resistance, as, for example, the resistance of an extraneous object left `between the blank-holder and die during the coming together of these parts. The yieldimparted to the ing of the said resilient part 35 prevents thel straining orbreaking of the more expensive and less easily procurable parts of the driving connections, for example, the rock shaft 27' and the adjustable connections 38 on the blank-holder slide, or equivalent parts.

The resilient means 35 are conveniently in the Jforni of a bolt 40, having an eye or knuckle head Ll2,vvhich bolt passes through a socket piece 414i formed upon the slide 20. A coiled spring 46 is arranged between a collar 47 on the bolt 40 and a part ofthe slide, as, for exam le, the under side of the socket piece d4. he collar 47 'may be so fastened on the bolt by means of nuts 49 on the lower screw threaded end of the said t bolt. The tension of the said spring is preferably such that it does not yield under the ordinary pressures of the blank-holder upon the work, but .will yield under an extraordinary resistance, such as that caused by yan extraneous object between the working parts of the press.

Any suitable connections may be provided between the slide 20 and its driving part. Preferably this means comprise a link 55 connected at one end tothe eccentric part of the driving forceV a crank shaft 27, which crank shaft 18, and connected at its other end to the knuckle or eye head 42 on the bolt, by means of a pin 57.

In the case of wide presses and heavyduty presses, the slide 20 and connections are preferably duplicated at the two sides ofthe press.

The inventive ideas may receive other embodiments than those herein specifically illustrated and described.

What is claimed is 1. A drawing press comprising a frame, a blank-holder or die-carrying slide, a drive-shaft, and driving connections between said slide and shaft, including parts` between said blank-holder slide and frame capable of bein set to rigidly press said blank-holder sli e against a blank, said connections also having a resilient part therein between the drive-shaft and said parts capable' of being rigidly set, adapted to yield when said blank-holder slide meets an extraordinary resistance.

2. A drawing press, comprising a frame, a blank-holder or die-carrying slide, a driveshaft, and driving connections between said slide and shaft including a toggle connected to said frame and to said slide, said connections having a resilient part therein between the shaft and toggles adapted to yield when said blank-holder slide meets with an extraordinary resistance.

3. A drawing press,a comprising a frame, a blank-holder or die-carrying slide, a driveshaft, and driving connections between said slidev and shaft, said driving connections comprising a toggle connected to said frame and to said slide, a slide and a resilient part between said driving connection slide and said drive shaft, adapted to yield when said blank-holder slide meets with an extraordinary resistance.

4. A drawing press, comprising a frame, a blank-holder or die-carrying slide, a driveshaft, and driving connections between said slide and shaft, said drivin connections comprising parts between said frame and blank-holder slide capable of being set to rigidly vpress said blank-holder against a blank, said connections further comprising a slide, a spring-resisted part on said latter slide, an eccentric part on said shaft, and a link connecting said spring resisted part and said eccentric part, said spring resisted part being adapted to yield when said blankholder slide meets with an extraordinary resistance.

5. A drawing press, comprising a frame, ablank-holder or die-carrying slide, a driveshaft, and driving connections between said slide and shaft, said driving `connections comprising parts between said frame and blank-holder slide capable of being set to rigidly press said blank-holder against a latter slide,

blank, said connections further comprising a slide, a spring-resisted part on said latter slide, an eccentric part on said shaft, and a link connecting said spring resisted part and said eccentric part, said spring resisted part being adapted to yield when said blankholder slide meets with an extraordinary resistance, and guiding means for preventing turningof said spring resisted part.

6. A drawing press, comprising a frame, a blank-,holder or die-carrying slide, a driveshaft, and driving connections between said slide and shaft, said driving connections comprising parts between said frame and blank-holder slide capable of being set to rigidly press said blank-holder against a blank, said connections further comprising a slide, an eye-headed bolt, a socket in said a spring around said bolt bearing against a part of said latter slide for preventing movement of said bolt in said socket, except when said blank-,holderV slide meets an extraordinary resistance, an eccentric part on said shaft, and a link connection between said eccentric connection and eye-headed bolt.

7 A drawing press, comprising a frame, a blank-holder or die-carrying slide, a driveshaft, and driving connections between said slide and shaft, said driving connections comprising parts between said frame and blank-holder slide capable of being set to rigidly press said blank-holder against a blank, said connections further comprising a slide, an eye-headed bolt, a socket in said latter slide, a spring around said bolt bearing against a part of said latter slide for preventing movement of said bolt in said socket, except when said blank-holder slide meets an extraordinary resistance, an eccentric part on said shaft, and a link connection between said eccentric connection and eye-headed bolt, and guiding means for preventing turning of said eye bolt.

8. A drawing press, comprising aframe, a blank-holder or die-carrying slide, a driveshaft, and driving connections between said slide and shaft, said driving connections comprising parts between said'frame and blank-holder slide capable of being set to rigidly press said blank-holder against a blank, said connections further comprising a slide, a spring-resisted part on said latter slide, an eccentric `part on said shaft, and a link connecting said spring resisted part and said eccentric part, said spring resisted part being adapted to yield when said blankholder slide meets with an extraordinary resistance, said latter slide and resilient part being on the outer side of the press-frame.

1n witness whereof, I have hereunto signed my name.

WILLIAM KLOCKE.

ros 

